I would have to agree with post 3 and 4.
We have a 3 year old house that was completely spray foamed. And we have a total electric house (so no gas) but we do have heat pump units.
We keep our thermostats set at 74° in the winter and 78-79° in the summer, at all times. Works for us since I work in a heated shop, but no ac. The warmer temps in the summer help me stay acclimated better. & We have VERY low electric bills considering the size of our house.
A few years ago in our old house, we lost electric for almost a week durring an ice storm in december. When power finally came on, our heater ran for almost 24 hours straight. Of course it would kick on and run then reach temp and kick off. But within a couple minutes (literally) it was back on. Everything was still so cold, the floor and walls- everything, you couldn't hardly stand on the floor and you couldn't hardly get warm yourself.
I've always heard the same thing about keeping things constant- uses less electric. Makes sence to me, inertia works kinda like it, and they say driving a constant speed saves over stop and go driving. Sound like simple physics ? Maybe?
MillerTime- Future Sabre Handler!!